Atomic number of Element – A = 12
Element – B = 7
Element – C = 20
Element – D = 15
Out of these elements, which elements are having similar properties
andgive a detailed reason for your answer by interpreting with
electronic configuration.
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Answer:
The electronic configuration of Ca(20) is =2,8,8,2
Number of valance electrons =2
The elements with atomic number 12 and 38 both have 2 valence electrons in their outer shell but elements with 19 has 1 valance electron and 21 has 3 valance electrons. Therefore elements with atomic number 12 and 38 have physical and chemical properties resembling calcium.
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